CODE ANALYSIS:

$5.$ The following $16-$bit words are loaded at $($unspecified$)$ address D $.$ The PC is set to address $\backslash (\backslash$mathrm$\{$D$\}+2\backslash )$ and instructions are executed until the point indicated by the comment.

$```$

$0000000000000101$ ; This is the content of memory at address D$+1$

; Start LC$-3$ execution here

$0010101111111110$

$0010110111111100$

$0101111111100000$

$0001111111000101$

$0001110110111111$

$0000001111111101$

$11110100111110111$

$011111110000001$

; end LC$-3$ execution here

$```$

After the code reaches the end of the code $($the last comment$),$ what bits are held in R$4?$ And in R$5?$ And in R$6?$ And in R$7?$ Explain your answer.